Method of producing fireproof materials from quartz and the like.



Pitt

"WILHIELM BGEHM, BERLIN, GIERJFEANY.

insecure.

1% Drawing.

Specification of Letters Patent.

Application filed Getober 30, 1913.

Patented dune Serial No. 798,374.

To all whom it may concern:

lie it known that l, VVEHEL'M Bonner,

u. subject of the Emperor oi Germany, resids considerable expenditure of heat for the purpose oi reducing the quartz to e fluid state. the present invention the energy employed, viz., that of the electric current is fur more servicerthly utilized owing to its concentration.

According tothe present invention the quartz zircon or tic lilac to he melted is covered With u voictile electrieeliy conductive substance. For this purpose diluted sods. or potash lye has been found purticw lerly suitable.

An electric current is switched on and. takes 211. prescribed course through the soda lye or the like, end within 11 few seconds heats the send quartz or zircon to such e. degree that these themselves become conductors and are very quickly reduced to s fluid state. The auxiliary conductor then evopo. rates. it is also possible by means of the current passing through or some other source of host to keep the material if neccs sury still longer in at liquid starts and to in old it. 5

tine form of the invention consists in forcing the objects to produced from quartz sand or the like, the molded mete-- risi being mired or covered with at conductire substance such as sods or potash lye.

When the current is switched on the mass :it'once begins to set cenductivcly end to melt under reduction of the current resistance, until the mass is completely melted. When the current is switched oil the molten mass hcrdens very quickly and then forms objects produced from quartz or the like.

The employment, psrticulerly 0i? sods lye or potash iye has the advantage thut'iu con sequence of their low boiling point these substances are quickly cvuporirted by the heat of the material to he snieited. The is vcntion is adapted for meltingsuch orrids containing" elements of the silicon group as silicon oxid, zirconium oxid. tituniuni exidi ceriuni orrid and thorium. brie. 1' Having now particularly described and ascertained the nature 0i my said inventiou and in What manner the some is to be performed, I declare that whet if claim is:

1. The herein described method of meiting an oxid. of an element oi. the silicon group comprising treating; the material to be melted to render it electrivslly conductive and then heating it to the melting point by passing 1.11 electric current therethrou 2. The herein described method oi ii ing oxirl oi an. element er the group comprising; ussocieti i t teziul to he incited a. milutne eicetricully conductive, substance and passing a current of electricity therethrough.

3. The herein described method of melting an oxid of an element oi. the silicon group comprising" associating with the me.- tcrioi to he incited u caustic alkali solution and passing :1 current oi electricity therethrough.

The herein. described method oil melting sir-conic comprising treating said mu." tcriul t render it electrically conductive and then heatinfh; in to e melting temper-shire by in electric current therethrough.

5. The herein desc 'ibedinethod a melting zirconiu comprising ussocinting there-- with u VOiHtilQ, electrically conrmctiv'e, sch-- stance unol passing it current electricity therethrough.

6. The herein descrihed method. oft "noit mg zirconiu comprising essociuting there- With a. caustic afit'aii solution 2 "LL. 22. current of electricity theretlr ru h.

7. The herein described method of germ ducing articles ifroiirzin oirid oil? uh eler it oi' the silicon group comprising associating; "with the selected materiel s volutile, elec triceliy conductive, substance, pussing :i current 01" electricity therethrouggfh to heat the ouid sutiicicntly to render eiectriceiiy iitl conductive, said oxid being mel ed by the confiinued action of the electric current thereon and the added electrically conductive substance being volatilized bythe heat 5 generated during the melting, and molding the molten material.

In testimonv whereof I aflix my signa Witnesses HENRY HAsPER, W OLDEMAR HAUPT. 

